Lock-nut for bolts.



0. M. WATSON.

LOOK NUT FOR BOLTS. APPLICATION FILED 11113.21, 1911.

' 1,019,387, Patented Mar. 5, 1912.

I Attorneys.

ORRA M. WATSON, 0F DALLAS CITY, ILLINOIS.

LOCK-NUT FOR BOLTS.

Specification of Letters Patent.

Patented Mar. 5, 1912.

Application filed August 21, 1911. Serial No. 645,077.

To all whom it may concern:

Be it known that I, ORRA M. WVA'rsoN, a citizen of the United States,residing at Dallas City, in the county of Hancock and State of Illinois,have invented a new and useful Lock-Nut for Bolts, of which thefollowing is a specification.

This invention relates to improvements in lock-nuts for bolts.

The invention has for its object to provide for effectively securing thenut upon its bolt as against possible casual displacement from thetransmission of a jarring action or concussions to said nut.

A further object isto carry out the afore said ends in a simple,effective and inexpensive manner.

The invention consists of certain instrumentalities and featuressubstantially as hereinafter fully disclosed and defined by the claims.

In the accompanying drawing, illustrating the preferred embodiment of myinvention wherein numerous changes and modifications may be made as tothe details of the construction and arrangement of the parts withoutdeparting from the spirit of my in vention, Figure 1 is an elevationalview of the same. Fig. 2 is a sectional elevation thereof. Fig. 3 is atransverse section taken on the line 3--3 of Fig. 1. Fig. 4 is adetached perspective of the retaining or looking member or dog. Fig. 5is also a transverse sect-ion taken on the line 5-5 of Fig. 1, viewingupwardly.

In practicing my invention, I provide a bolt 1 with an axial slot orslit 2, which longitudinally severs the threaded portion thereof aboutcentrally. A nut 3, suitably screwing upon the threaded portion of saidbolt has its inner surface formed with a circular recess 4: whose wallsare suitably notched, serrated or toothed forming a ratchet surfacethereon, as at 5, for a purpose presently seen. A dog or looking mem her6 of peculiar construction,preferably as disclosed particularly by Fig.4, the same being of substantially Z-shape, or zigzag in outline,adapted to be inserted into the slit or slot 2 of the bolt 1, this beingdone previous to placing the nut in position upon the bolt. The dog orlooking member 6 is received within the annular or circular recess 4: ofthe nut 3, the end portions thereof 7, standing about tangentially tothe annular contour of the bolt and suitably pointed or beveled as at 8for engagement with the ratchet surface 5 of the walls of said recess,said dog or member having sufficient resiliency to cause the pointed orbeveled ends thereof to automatically engage or spring into theserrations or notches of said ratchet surface as the nut is screwed uponthe bolt to the maximum extent, thus providing for securing the nut inlocked position. The opposite end portions of said dog are provided withlugs or projections 9, outstanding from the lateral edges thereof, so asto be out of alinement with the dog or member 6 and to extend beyond thenut, for their ready engagement by the hand or fingers in convenientlyinserting the dog into the slot or slit of the bolt, or its removal.

It is apparent from the foregoing disclosure, taken in connection withthe accompanying illustration, that my invention is extremely simple,embracing but the minimum parts, therefore inexpensive of manufacture,while it is readily applied for use and is effective in action.

What is claimed is 1. A. nut-lock, including an axially slotted bolt, anut engaging said bolt and having an annular recess therein, whose wallsare formed with a ratchet-surface, and a dog received by the slot ofsaid bolt and adapted to engage the ratchet-surface of said nut, saiddog having a lug outstanding therefrom out of alinement with the dog.

2. A nut-look, including an axially slotted bolt, a nut having aratchet-surfaced. recess and a dog of zigzag outline received by theslot of said bolt, with end portions thereof standing tangentially tothe surface of the bolt and adapted to engage the ratchet surface of therecess of said nut, the endportions of said dog having lugs outstandingtherefrom, out of alinement with the dog.

3. A nut-lock including an axially slotted bolt, a nut having an annularrecess whose walls are formed with a ratchet surface, and a dog ofapproximately L-shaped outline re- In testimony that I claim theforegoing as my own, I have hereto ai fiXed my signature in the presenceof two Witnesses.

ORRA M. WATSON.

ceived bodily and transversely Within the slot of the bolt, theterminals of Which dog extend tangentially to the surface of the boltand in opposite directions to engage said ratchet-surface of the nut,said ter- WVitnesses:

minals of the dog having lugs projecting at WILLIAM H. DAMRON,

FRED E.

right-angles from the upper edges thereof.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

